A combustion reaction involves the reaction of a substance with oxygen gas. The

Question

A combustion reaction involves the reaction of a substance with oxygen gas. The complete combustion of any hydrocarbon (binary compound of carbon and hydrogen) produces carbon Complete combustion of heptane produces 7 liters of carbon dioxide for every 8 liters of water vapor (both measured at the same temperature and pressure). What is the ratio of carbon atoms to e and water as the only products. Heptane is a hydrocarbon that is found in gasoline. hydrogen atoms in a molecule of heptane? A combustion reaction involves the reaction of a substance with oxygen gas. The complete combustion of any hydrocarbon (binary compound of carbon and hydrogen) produces carbon Complete combustion of heptane produces 7 liters of carbon dioxide for every 8 liters of water vapor (both measured at the same temperature and pressure). What is the ratio of carbon atoms to e and water as the only products. Heptane is a hydrocarbon that is found in gasoline. hydrogen atoms in a molecule of heptane?

Explanation / Answer

Complete combustion of heptane

C7H16 + 11 O2 -----> 7 CO2 + 8 H2O

For 1 mol of combustion of heptane 7 moles of CO2 and 8 moles of H2O are produced.

From the carbon balance

Carbon atoms C = 7 x 1 = 7

From the hydrogen balance

Hydrogen atoms H = 8 x 2 = 16

C/H = 7/16

hydrogen atoms in a molecule of heptane = 16

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